as follows, the main thread calls push () , and the second thread front () reads the head of the queue, and the team is busy when it is empty. As a result, line 11 front () reported an error deque iterator not dereferencable . After taking a look ...
In SGI STL, unused memory is mounted as a linked list in free_list . If there is enough memory in free_list , it is returned directly. However, memory recycling is not necessarily in the order in which memory is requested, which leads to the fact that...
We usually new an object, and the process of requesting memory is completed by operator new, so how does allocator in stl take over operator new to complete the memory request? How is the memory request right of an object transferred? I don t think oper...
when learning < random > library, only seed_seq does not quite understand although I went to MSDN, and cppreference, it is not very clear that there is too little information about seed_seq on Google. my understanding is: when a given seed is not ve...
the standard library container before CPP11 overloaded constant and non-constant object versions for begin and end, and defined cbegin and cend for constant version lines in 11. 11 what is the point of doing this, that is, what is the advantage of suc...
now after I use django restfulframework to write the back-end code and deploy it to the server through nginx+uwsgi, enter ip to display the API page. Now, after the front-end code is taken, how to deploy it and enter ip to display the home page instead o...
problem description @ click.option how to add logical judgment? related codes for example: @click.option( --label1 ) @click.option( --label2 ) @click.option( --label3 ) def main_app_init(label1= , label2= , label3= ): pass det...
<?foreach ($region_get_all->regions as $key):?> <?endforeach;?> suppose I get multiple numbers via foreach what I want to do is that when the user selects the "edit " data , I will show the div that there will be data , and wil...
what is the principle of picture upload and what needs to be sent to the background? Xiaobai asks for guidance. ...
1. What are the following ways to implement the skeleton screen? . Abbreviated picture . Special static html 2. Can the skeleton screen be generated automatically? what is the principle if it can be generated automatically? ...